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発表 Investigation of Seismic Behaviour of a Road Embankment on Soft Ground Based on Earthquake Observation Records

作成年度 2007年度
論文名 Investigation of Seismic Behaviour of a Road Embankment on Soft Ground Based on Earthquake Observation Records
論文名(和訳)
論文副題
発表会 4th International Conference on Earthquake Geotechnical Engineering(第4回地震・地盤工学に関する国際会議)
誌名(No./号数)
発表年月日 2007/06/25 ~ 2007/06/28
所属研究室/機関名 著者名(英名)
寒地地盤チーム西本 聡(NISHIMOTO Satoshi)
飛島建設防災R&Dセンター池田 隆明(IKEDA Takaaki)
飛島建設防災R&Dセンター上明戸 昇(KAMIAKITO Noboru)
飛島建設防災R&Dセンター三輪 滋(MIWA Shigeru)
抄録
In the city of Tomakomai、 Hokkaido、 the seismic behavior of soft ground and of a road embankment built on such ground have been observed、 toward investigating the seismic performance of a road embankment constructed on soft ground and improving seismic engineering. Earthquake observations on soft ground started in 1991 at two locations、 one where volcanic ash soil predominates and the other where sandy soil predominates. Observation records have been obtained for 17 earthquakes、 including the Hokkaido Toho-Oki earthquake (Mj8.2)、 and they have been used to clarify the seismic behavior of soft ground、 whose complexity makes its seismic behavior nonlinear. Earthquake observations started at a road embankment in 1996、 and records have been obtained for 9 earthquakes whose maximum amplitudes ranged from less than 10 cm/s/s to the more than 100 cm/s/s of the 2003 Tokachi-Oki Earthquake (Mj8.0). This study uses these records to examine the nonlinear seismic behavior of a road embankment. The results show that the seismic behavior of soft ground and the road embankment is nonlinear、 that a cross-sectional area of the embankment behaves as an integrated system、 and that the low-order natural frequency is roughly the same in the ground as in the embankment.
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